in those days（当时）为什么day要加s

in those days（当时）为什么day要加s in those days还是on those days He (be)_rich in those days答案为什么是was,有these days的地方用于现在完成时,本句中有those days,为什么用于一般过去时 这些天是these days,那些天却是in those days,为什么?一个加in一个不加? in those difficult days.为什么要用in啊,不是应该on ...day的吗? There were few schools in those days. In Those Days可以繁殖以前吗 this is because in the early days of radio,those who .中间为什么要加逗号 you have no idea___ in those days为什么添how busy we were? 为什么“在那些日子”是in those days,而这些日子是these days,不是in these daysThey are busy preparing for the maths test these days.不能写成in these days吗?In those days,the could not go to school.不能写成those days吗 has been ill in bed ____ three days .A.in these B.in those C.these D.those为什么不可以选B？ 在三年前的英语怎么说网上说是three years ago,我想问为什么不是in three years ago还有在那些天的英语为什么不是in those days,为什么不是in those days I live in America about five years .Those days I ,missedI live in America_____ about five years .Those days I missed my hometown very muchA.on B.for C.in D.during告诉我为什么这么做哈 ,. in加一段时间用在将来时,那为什么in those days（在那些日子里）用在过去式.给我弄糊涂了?in加段时间到底是用在将来时还是过去式. She often came to help us in those days. There were no-------- books in those days.(print) in those days应用什么时态中请附加例句 Do you still remember those days ___we studied in American?